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Fine structure of the axon collaterals of Huber in frog spinal ganglia

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Summary

The fine structure of intracapsular axon collaterals in the spinal ganglia ofRana nigromaculata nigromaculata has been studied. The collaterals originated from the initial tract of the axon, before its bifurcation. They were about 0.8 μm in diameter and contained numerous longitudinally aligned neurofilaments, a few mitochondria and vesicles. The end bulbs of axon collaterals contained spirally arranged bundles of neurofilaments; mitochondria, agranular and granulated vesicles, and dense bodies occurred underneath the plasma membrane. The axon collaterals generally lay in the periaxonal labyrinth formed by processes of the polar cells around the initial tract of the axon and the axonal pole of the spinal ganglion cell. The significance of the intracapsular axon collaterals is discussed.

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Kohno, K., Nakayama, Y. Fine structure of the axon collaterals of Huber in frog spinal ganglia. J Neurocytol 2, 383–391 (1973). https://doi.org/10.1007/BF01103796

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Keywords

  • Plasma Membrane
  • Fine Structure
  • Ganglion Cell
  • Polar Cell
  • Dense Body